   1. <?php   
   2. ###################################################################################   
   3. #   
   4. # XML Library, by Keith Devens, version 1.2b   
   5. # <a href="http://keithdevens.com/software/phpxml" target="_blank">http://keithdevens.com/software/phpxml</a>   
   6. #   
   7. # This code is Open Source, released under terms similar to the Artistic License.   
   8. # Read the license at <a href="http://keithdevens.com/software/license" target="_blank">http://keithdevens.com/software/license</a>   
   9. #   
  10. ###################################################################################   
  11.   
  12. ###################################################################################   
  13. # XML_unserialize: takes raw XML as a parameter (a string)   
  14. # and returns an equivalent PHP data structure   
  15. ###################################################################################   
  16. function & XML_unserialize(&$xml){   
  17.     $xml_parser = &new XML();   
  18.     $data = &$xml_parser->parse($xml);   
  19.     $xml_parser->destruct();   
  20.     return $data;   
  21. }   
  22. ###################################################################################   
  23. # XML_serialize: serializes any PHP data structure into XML   
  24. # Takes one parameter: the data to serialize. Must be an array.   
  25. ###################################################################################   
  26. function & XML_serialize(&$data, $level = 0, $prior_key = NULL){   
  27.     if($level == 0){ ob_start(); echo '<?xml version="1.0" ?>',"\n"; }   
  28.     while(list($key, $value) = each($data))   
  29.         if(!strpos($key, ' attr')) #if it's not an attribute  
  30.             #we don't treat attributes by themselves, so for an emptyempty element   
  31.             # that has attributes you still need to set the element to NULL   
  32.   
  33.             if(is_array($value) and array_key_exists(0, $value)){   
  34.                 XML_serialize($value, $level, $key);   
  35.             }else{   
  36.                 $tag = $prior_key ? $prior_key : $key;   
  37.                 echo str_repeat("\t", $level),'<',$tag;   
  38.                 if(array_key_exists("$key attr", $data)){ #if there's an attribute for this element  
  39.                     while(list($attr_name, $attr_value) = each($data["$key attr"]))  
  40.                         echo ' ',$attr_name,'="',htmlspecialchars($attr_value),'"';  
  41.                     reset($data["$key attr"]);  
  42.                 }  
  43.  
  44.                 if(is_null($value)) echo " />\n";  
  45.                 elseif(!is_array($value)) echo '>',htmlspecialchars($value),"</$tag>\n";  
  46.                 else echo ">\n",XML_serialize($value, $level+1),str_repeat("\t", $level),"</$tag>\n";  
  47.             }  
  48.     reset($data);  
  49.     if($level == 0){ $str = &ob_get_contents(); ob_end_clean(); return $str; }  
  50. }  
  51. ###################################################################################  
  52. # XML class: utility class to be used with PHP's XML handling functions   
  53. ###################################################################################   
  54. class XML{   
  55.     var $parser;   #a reference to the XML parser   
  56.     var $document; #the entire XML structure built up so far   
  57.     var $parent;   #a pointer to the current parent - the parent will be an array   
  58.     var $stack;    #a stack of the most recent parent at each nesting level   
  59.     var $last_opened_tag; #keeps track of the last tag opened.   
  60.   
  61.     function XML(){   
  62.          $this->parser = &xml_parser_create();   
  63.         xml_parser_set_option(&$this->parser, XML_OPTION_CASE_FOLDING, false);   
  64.         xml_set_object(&$this->parser, &$this);   
  65.         xml_set_element_handler(&$this->parser, 'open','close');   
  66.         xml_set_character_data_handler(&$this->parser, 'data');   
  67.     }   
  68.     function destruct(){ xml_parser_free(&$this->parser); }   
  69.     function & parse(&$data){   
  70.         $this->document = array();   
  71.         $this->stack    = array();   
  72.         $this->parent   = &$this->document;   
  73.         return xml_parse(&$this->parser, &$data, true) ? $this->document : NULL;   
  74.     }   
  75.     function open(&$parser, $tag, $attributes){   
  76.         $this->data = ''; #stores temporary cdata   
  77.         $this->last_opened_tag = $tag;   
  78.         if(is_array($this->parent) and array_key_exists($tag,$this->parent)){ #if you've seen this tag before  
  79.             if(is_array($this->parent[$tag]) and array_key_exists(0,$this->parent[$tag])){ #if the keys are numeric  
  80.                 #this is the third or later instance of $tag we've come across   
  81.                 $key = count_numeric_items($this->parent[$tag]);   
  82.             }else{   
  83.                 #this is the second instance of $tag that we've seen. shift around  
  84.                 if(array_key_exists("$tag attr",$this->parent)){  
  85.                     $arr = array('0 attr'=>&$this->parent["$tag attr"], &$this->parent[$tag]);  
  86.                     unset($this->parent["$tag attr"]);  
  87.                 }else{  
  88.                     $arr = array(&$this->parent[$tag]);  
  89.                 }  
  90.                 $this->parent[$tag] = &$arr;  
  91.                 $key = 1;  
  92.             }  
  93.             $this->parent = &$this->parent[$tag];  
  94.         }else{  
  95.             $key = $tag;  
  96.         }  
  97.         if($attributes) $this->parent["$key attr"] = $attributes;  
  98.         $this->parent  = &$this->parent[$key];  
  99.         $this->stack[] = &$this->parent;  
 100.     }  
 101.     function data(&$parser, $data){  
 102.         if($this->last_opened_tag != NULL) #you don't need to store whitespace in between tags   
 103.             $this->data .= $data;   
 104.     }   
 105.     function close(&$parser, $tag){   
 106.         if($this->last_opened_tag == $tag){   
 107.             $this->parent = $this->data;   
 108.             $this->last_opened_tag = NULL;   
 109.         }   
 110.         array_pop($this->stack);   
 111.         if($this->stack) $this->parent = &$this->stack[count($this->stack)-1];   
 112.     }   
 113. }   
 114. function count_numeric_items(&$array){   
 115.     return is_array($array) ? count(array_filter(array_keys($array), 'is_numeric')) : 0;   
 116. }   
 117. ?>   